The correct answer is a sleep disorder.
A condition known as obstructive sleep apnea is common amongst overweight and obese people. Obstructive sleep apnea is a serious sleep disorder where the person stops breathing during sleep, the upper airway becomes blocked by excess tissue in the throat and mouth and the person is essentially choking and gasping for air while sleeping. This happens repeatedly during sleep and can restrict oxygen to the brain and rest of the body and can lead to death. Losing weight can definitely help treat the condition.
